1660978830 has 32 divisors (see below), whose sum is σ = 4555828224. Its totient is φ = 379652256.

The previous prime is 1660978817. The next prime is 1660978883. The reversal of 1660978830 is 388790661.

It is a self number, because there is not a number n which added to its sum of digits gives 1660978830.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3954502 + ... + 3954921.

It is an arithmetic number, because the mean of its divisors is an integer number (142369632).

Almost surely, 2^1660978830 is an apocalyptic number.

1660978830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1660978830 is an abundant number, since it is smaller than the sum of its proper divisors (2894849394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1660978830 is a wasteful number, since it uses less digits than its factorization.

1660978830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7909440.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 1660978830 is about 40755.1080234122. The cubic root of 1660978830 is about 1184.2808290936.

The spelling of 1660978830 in words is "one billion, six hundred sixty million, nine hundred seventy-eight thousand, eight hundred thirty".